User Manual

Form #43219020
Sept 2012
15) BURNER OPERATION/TROUBLESHOOTING
A) IGNITION MODULE DIAGNOSTICS
The LED located on the ignition module (see Figure)
will flash ON for ¼ second, then OFF for ¼ second
during a fault condition. The pause between fault
codes is 3 seconds.
LED Indication
Error Mode
Steady On
Internal Control Failure
2 Flashes
Flame Sense Fault
3 Flashes
Ignition Lockout
B) FLAME SENSOR TESTING
The flame current is the current that passes through
the flame from the sensor to the ground. The
minimum flame current necessary to keep the system
from lockout is 0.7 microamps. To measure the flame
current, connect an analog DC microammeter to the
FC- and FC+ terminals per diagram. The meter should
read 0.7 µA or higher when the burner is running full
on. If the meter reads below zero, the meter leads are
reversed. Disconnect power and reconnect the meter
leads for proper polarity.
C) TROUBLESHOOTING CHART
TROUBLE
POSSIBLE CAUSE
SOLUTIONS
Heater is not glowing
red…
 The supply gas pressure is too low.
 Improper size of gas piping.
 The orifice is clogged.
 Incorrect orifice size.
 Check the manifold gas pressure and
adjust if necessary.
 If you are not sure of the performance,
use the NFPA 54 gas pipe sizing table.
 Clean the orifice.
 See the instructions for correct orifice
size and replace if necessary.
Heater will not
attain the desired
temperature…
 There is insufficient heat in the building
for heat loss (i.e., not enough heaters).
 The thermostat sensing bulb is
incorrectly placed.
 The thermostat is out of calibration.
 Conduct heat loss and add heaters or
other source of heat as necessary.
 Reposition as necessary for proper
operation. NOTE: The sensing bulb
should be shielded from direct radiation
to prevent short cycling of the heater.
 Recalibrate (if possible) or replace.
Flames flaring up,
outside of emitter
surface…
 The gas pressure is too high.
 Incorrect orifice size.
 Incorrect type of gas supplied to the
heater.
 Not enough combustion air.
 Check the manifold gas pressure and
adjust if necessary.
 See instructions for correct orifice size
and replace if necessary.
 Check the nameplate to identify the
correct type of gas the heater is equipped
to operate.
 Clean the emitter with compressed air.
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